var xpower_status = document.referrer.indexOf("http://xpower.aafp.org");
   var cms_status = document.referrer.indexOf("http://cms.aafp.org");
   var cmstest_status = document.referrer.indexOf("http://cmstest.aafp.org");

   if (xpower_status != -1 || cms_status != -1 || cmstest_status != -1) {
     // do nothing.
   }
   else {
      if (self.parent.frames.length != 0){
         self.parent.location=document.location;
      }
   }